CN219618431U - Micro-foaming injection mold with rapid cooling and rapid heating functions - Google Patents

Abstract

The utility model discloses a micro-foaming injection mold with a rapid cooling and rapid heating function, which comprises a front mold, a rear mold and an injection gun, wherein the front mold comprises a front compound plate and a first cavity piece; the rear mould comprises a rear compound plate, a base plate, a second cavity piece and a core piece; and a plurality of quench and quench pipelines. Before micro-foaming injection molding, the rapid cooling and rapid heating equipment injects steam or high temperature water into a rapid cooling and rapid heating pipeline to raise the temperature of the mold, so that the temperature of the mold reaches or exceeds the melting temperature of the plastic, and then the molten plastic is injected. Thus, the plastic at the front end is injected, the flowing state is kept, and the rapid filling is realized. After the filling is completed, the high-temperature water or steam is pulled out of the quenching and quenching pipeline, and the quenching and quenching equipment injects high-pressure cooling water into the quenching and quenching pipeline, so that the molding period can be shortened by accelerating the solidification speed of plastics, the problems of warping, sagging and the like are solved, and a product without the surface quality problems of weld marks, silver threads and the like is formed.

Description

Micro-foaming injection mold with rapid cooling and rapid heating functions

Technical Field

The utility model relates to the technical field of injection molds, and particularly discloses a micro-foaming injection mold with a rapid cooling and rapid heating function.

Background

The micro-foaming injection molding process is an innovative precise injection molding technology, breaks through the limitations of the traditional injection molding, can obviously lighten the weight of a finished piece, shortens the molding period and greatly improves the buckling deformation and the dimensional stability of the finished piece; the micro-foaming injection molding process has great advantages in the production of precision products with high quality requirements; is also one of the most widely used and fast-developed precision molding techniques. However, taking the production of long-barrel products as an example, the cavity and the core of the mold are long, and the plastic at the front end of injection molding is easy to have poor fluidity due to natural temperature reduction, so that the mold filling is insufficient. And the problems of welding lines, welding marks, waves, silver threads and the like appear on the surface of the plastic product produced by the micro-foaming injection molding process due to shrinkage, so that the surface of the product is rough, and the appearance is influenced.

Disclosure of Invention

In order to overcome the defects and the shortcomings in the prior art, the utility model aims to provide a micro-foaming injection mold with a rapid cooling and rapid heating function, and solve the problem of rough surface of a micro-foaming injection molding product.

In order to achieve the above purpose, the micro-foaming injection mold with the rapid cooling and rapid heating functions comprises a front mold, a rear mold and an injection molding gun, wherein the front mold comprises a front compound plate and a first cavity piece arranged on the front compound plate, the injection molding gun penetrates through the front compound plate and the first cavity piece, the rear mold comprises a rear compound plate, a base plate, a core piece and a second cavity piece, the base plate is arranged on the rear compound plate, one end of the core piece penetrates through the base plate and is arranged on the rear compound plate, the second cavity piece is arranged on the base plate, the second cavity piece is wrapped outside the other end of the core piece, and the first cavity piece is covered outside one end of the second cavity piece; the mold further comprises a plurality of quenching and quenching pipelines which are respectively embedded in the first cavity piece, the base plate, the core piece and the second cavity piece, and the quenching and quenching pipelines are communicated with external quenching and quenching equipment.

Specifically, the second cavity piece is formed by combining two sub-pieces, a cavity with two open ends is formed inside the two sub-piece combination, the base plate is blocked at one open end of the cavity, the core piece is positioned in the cavity, and the end part of the core piece penetrates through the opening of one end of the cavity, which is close to the base plate.

Specifically, the front mould further comprises a cavity cover, the cavity cover is arranged in the cavity of the first cavity piece, the cavity cover is provided with an injection molding opening, the injection molding gun performs injection molding through the injection molding opening of the cavity cover, the inside of the cavity cover is inlaid with the rapid cooling and rapid heating pipeline, and the cavity cover is used for shielding the opening at the other end of the cavity.

Specifically, the back mould still includes the limiting plate, and the quantity of limiting plate is two, and two limiting plates are all installed on the backing plate, and two limiting plates are used for spacing two branches of fixed second die cavity spare.

Specifically, the rear mould further comprises four interface seats for communicating an inlet and an outlet of the integrated plurality of rapid cooling and rapid heating pipelines, the four interface seats are arranged on the backing plate and located between the two limiting plates, and the four interface seats are respectively located on two sides of the second cavity piece in pairs.

Specifically, the rear mould also comprises a plurality of heat insulation plates, the heat insulation plates are arranged outside the second cavity piece in a surrounding mode, and the heat insulation plates are respectively positioned between the second cavity piece and the limiting plate and between the second cavity piece and the interface seat.

Specifically, the front mould further comprises two limiting blocks, the two limiting blocks are arranged on the first cavity piece, the two limiting blocks are respectively located between the two interface seats on the same side, and the limiting blocks are used for propping against the heat insulation plate.

Specifically, the front die is provided with four guide posts which are respectively and fixedly arranged at four corners of the front compound plate; the rear mould is provided with a guide sleeve matched with the guide post, and the guide post is movably accommodated in the guide sleeve.

Specifically, still include the lock module that is used for connecting locking front mould and back mould, the one end of lock module is connected in first die cavity spare through the screw connection, and the other end of lock module is connected in the limiting plate through the screw.

Specifically, the first cavity piece and the rear compound plate are provided with a plurality of inlets and outlets which are used for communicating the rapid cooling and rapid heating pipeline with external rapid cooling and rapid heating equipment.

The utility model has the beneficial effects that: the utility model relates to a micro-foaming injection mold with a rapid cooling and rapid heating function, which comprises a front mold, a rear mold and an injection molding gun, wherein the injection molding gun is arranged on the front mold, and the front mold comprises a front compound plate and a first cavity piece; the rear mould comprises a rear compound plate, a base plate, a second cavity piece and a core piece; the mold further comprises a plurality of quenching and quenching pipelines which are respectively embedded in the first cavity piece, the base plate, the core piece and the second cavity piece, and the quenching and quenching pipelines are communicated with external quenching and quenching equipment. Before micro-foaming injection molding, external quenching and quenching equipment injects steam or high temperature into a quenching and quenching pipeline to raise the temperatures of a first cavity piece, a second cavity piece and a core piece in a mold, so that the temperature of the mold reaches or exceeds the melting temperature of plastics, and then molten plastics are injected. Thus, the plastic at the front end is injected, the flowing state is kept, and the rapid filling is realized. After the filling is finished, the high-temperature water or steam is pulled out of the quenching and quenching pipeline, and external quenching and quenching equipment injects high-pressure cooling water into the quenching and quenching pipeline, so that the forming period can be shortened by accelerating the solidification speed of plastics, the problems of warping, sagging and the like are solved, and products without the surface quality problems of weld marks, silver threads and the like are formed. The micro-foaming injection mold with the rapid cooling and rapid heating functions can solve the problem of rough product surface in the micro-foaming injection molding process, so that a product with good appearance is produced.

Drawings

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a schematic cross-sectional view of the present utility model;

FIG. 3 is a schematic view of the internal structure of the present utility model;

fig. 4 is a schematic perspective view of a quench and heat line according to the present utility model.

The reference numerals include:

1-front mould 2-back mould 3-injection gun

4-quick cooling and heating pipeline

11-front compound plate 12-first cavity piece 13-cavity cover

14-limiting block 15-guide pillar 16-lock module

21-rear plate 22-backing plate 23-core piece

24-second cavity piece 25-limiting plate 26-interface seat

27-heat shield 28-guide sleeve 29-auxiliary.

Detailed Description

The present utility model will be further described with reference to examples and drawings, which are not intended to be limiting, for the understanding of those skilled in the art.

Referring to fig. 1 to 4, a micro-foaming injection mold with rapid cooling and heating functions of the present utility model includes a front mold 1, a rear mold 2 and an injection gun 3, wherein the front mold 1 includes a front compound plate 11 and a first cavity member 12 mounted on the front compound plate 11, the first cavity member 12 is provided with a concave cavity, the injection gun 3 penetrates through the front compound plate 11 and the first cavity member 12, the rear mold 2 includes a rear compound plate 21, a backing plate 22, a core member 23 and a second cavity member 24, the backing plate 22 is mounted on the rear compound plate 21 via screws, one end of the core member 23 penetrates through the backing plate 22 and is mounted on the rear compound plate 21, the second cavity member 24 is mounted on the backing plate 22, the second cavity member 24 is wrapped outside the other end of the core member 23, when the mold is closed, the first cavity member 12 is covered outside one end of the second cavity member 24, i.e. the end of the second cavity member 24 near the first cavity member 12 extends into the cavity member 12, and is fixedly connected between the backing plate 22 and the first cavity member 12 via a cross beam and screws; the plastic injection molding die further comprises a plurality of quenching and quenching pipelines 4, the quenching and quenching pipelines 4 are respectively embedded in the first cavity piece 12, the base plate 22, the core piece 23 and the second cavity piece 24, so that the plastic injection molded into the die can be heated or cooled in all directions, and the quenching and quenching pipelines 4 are communicated with external quenching and quenching equipment.

Before micro-foaming injection molding, external rapid cooling and heating equipment injects steam or high temperature water into the rapid cooling and heating pipeline 4 to raise the temperature of the first cavity piece 12, the second cavity piece 24 and the core piece 23 in the mold, so that the temperature of the mold reaches or exceeds the melting temperature of plastics and then the molten plastics are injected. Thus, the plastic at the front end is injected, the flowing state is kept, and the rapid filling is realized. After the filling is completed, the high-temperature water or steam is pulled out of the quenching and quenching pipeline 4, and external quenching and quenching equipment injects high-pressure cooling water into the quenching and quenching pipeline 4, so that the forming period can be shortened by accelerating the solidification speed of plastics, the problems of warping, sinking and the like are solved, and a product without the surface quality problems of weld marks, silver threads and the like is formed. The micro-foaming injection mold with the rapid cooling and rapid heating functions can solve the problem of rough product surface in the micro-foaming injection molding process, so that a product with good appearance is produced.

Referring to fig. 1 to 3, the second cavity member 24 is formed by combining two sub-members, wherein a cavity with two open ends is formed inside the two sub-members, the backing plate 22 is sealed at one end opening of the cavity, the core member 23 is located in the cavity, and the end portion of the core member penetrates through the opening of the cavity near one end of the backing plate 22. During injection molding, molten plastic is injected into the cavity of the second cavity piece 24 from the end of the first cavity piece 12 through the injection molding gun 3, openings at the two ends of the cavity are respectively blocked by the first cavity piece 12 and the core piece 23, so that the molten plastic is molded in the second cavity piece 24, and the second cavity piece 24 is formed by combining two sub-pieces, thereby being beneficial to demolding products after injection molding.

Referring to fig. 2, the front mold 1 further includes a cavity cover 13, the cavity cover 13 is fixed at the bottom in the cavity of the first cavity member 12 by screws, the cavity cover 13 is provided with an injection port, the injection gun 3 performs injection molding by the injection port of the cavity cover 13, the cavity cover 13 is internally embedded with the rapid cooling and rapid heating pipeline 4, and the cavity cover 13 is used for shielding the opening at the other end of the cavity. When the mold is closed, the cavity cover 13 and the second cavity piece 24 are matched to form a complete cavity, molten plastic is injected into the cavity from an injection port through the injection gun 3 for filling, the cavity cover 13 and two sub-pieces are combined to form the cavity, demolding is facilitated after injection molding, and the rapid cooling and rapid heating pipeline 4 is convenient to set.

Referring to fig. 1 to 2, the rear mold 2 further includes two limiting plates 25, wherein the number of the limiting plates 25 is two, the two limiting plates 25 are both mounted on the backing plate 22 via screws, and the two limiting plates 25 are used for limiting and fixing two sub-parts of the second cavity member 24. The front compound plate 11 is the front side of the mould, the rear compound plate 21 is the rear side of the mould, two sub-parts of the second cavity piece 24 are combined left and right, two limiting plates 25 are respectively positioned on the upper side and the lower side of the mould and clamp the second cavity piece 24 in the middle, and a plurality of auxiliary pieces 29 are further arranged between the limiting plates 25 and the sub-parts to strengthen the limitation of the limiting plates 25 on the sub-parts, so that the combination of the two sub-parts can be tightly screwed.

Referring to fig. 1 to 3, the rear mold 2 further includes four interface seats 26 for communicating with the inlets and outlets of the integrated multiple rapid cooling and rapid heating pipelines 4, the four interface seats 26 are mounted on the backing plate 22 and located between two limiting plates 25, the four interface seats 26 are further connected with the two limiting plates 25 through screws, auxiliary members 29 are also disposed between the interface seats 26 and the limiting plates 25, and the four interface seats 26 are located on the left and right sides of the second cavity member 24. Because the second cavity piece 24 is located inside the die during film combination, the internal quenching and quenching pipeline 4 can only penetrate through other components to be communicated with external quenching and quenching equipment, and therefore, the four interface seats 26 are arranged to integrate and arrange the inlet and outlet of the quenching and quenching pipeline 4 of the second cavity piece 24, so that the matching degree of other components and the second cavity piece 24 is reduced, and the die is convenient to produce and manufacture.

Referring to fig. 2 to 3, the rear mold 2 further includes a plurality of heat insulation plates 27, wherein the plurality of heat insulation plates 27 are disposed around the second cavity member 24 and mounted on the second cavity member 24 through screws, and the plurality of heat insulation plates 27 are respectively disposed between the second cavity member 24 and the limiting plate 25, and between the second cavity member 24 and the interface seat 26. The insulating plate 27 may be an bakelite insulating plate 27, and the second cavity member 24 and the core member 23 mainly contacting with the injection molding product in the mold need quenching and quenching treatment, and the insulating plate 27 arranged outside the second cavity member 24 can isolate the quenching and quenching temperatures of the second cavity member 24 and the core member 23 from other parts of the mold so as to reduce damage to other parts of the mold caused by abrupt temperature changes.

Referring to fig. 1, the front mold 1 further includes two limiting blocks 14, the two limiting blocks 14 are mounted on the first cavity member 12, the two limiting blocks 14 are respectively located between two interface seats 26 on the same side, and the limiting blocks 14 are used for supporting against the heat insulation plate 27. The two limiting blocks 14 are respectively arranged on the end face, close to the rear die 2, of the first cavity piece 12 left and right through screws, the end face, far away from the first cavity piece 12, of the limiting block 14 is provided with a protruding portion, the second cavity piece 24 is provided with a corresponding groove, the protruding portion is contained in the groove during die assembly, and the limiting block 14 further limits two sub-pieces of the second cavity piece 24.

Referring to fig. 3, the front mold 1 is provided with four guide posts 15, and the four guide posts 15 are respectively and fixedly mounted at four corners of the front compound plate 11 through screws; the rear mould 2 is provided with a guide sleeve 28 matched with the guide post 15, and the guide post 15 is movably accommodated in the guide sleeve 28. The guide sleeve 28 is arranged in the limiting plate 25, and when the die is closed, the guide post 15 is inserted into the guide sleeve 28, so that the front die 1 and the rear die 2 can be aligned and closed quickly, and the production efficiency can be improved.

Referring to fig. 1, the mold assembly further includes a locking module 16 for connecting and locking the front mold 1 and the rear mold 2, wherein one end of the locking module 16 is connected to the first cavity member 12 via a screw, and the other end of the locking module 16 is connected to the limiting plate 25 via a screw. The locking modules 16 are used for locking and fixing the front mold 1 and the rear mold 2 after mold closing, four locking modules 16 are arranged, and four locking modules 16 are respectively arranged on the left side and the right side of the mold in pairs; when the injection molding is completed, the screws of the locking module 16 are screwed to separate the front mold 1 from the rear mold 2, so that the product is convenient for demolding.

Referring to fig. 1, the first cavity member 12 and the rear replica 21 are each provided with a plurality of inlets and outlets for communicating the quenching and quenching line 4 with the quenching and quenching equipment from the outside. The plurality of inlets and outlets of the first cavity piece 12 are used for communicating the quenching and quenching pipelines 4 of the first cavity piece 12 and the cavity cover 13 with quenching and quenching equipment of the outside; the ports of the back plate 21 are used to communicate the quench and quench lines 4 of the core piece 23 with the external quench and quench devices.

Referring to fig. 1, the mold further includes a plurality of supporting feet respectively disposed below the front compound plate 11, the rear compound plate 21, the first cavity member 12 and the bottom of the lower limiting plate 25, and the plurality of supporting feet are used for supporting the entire mold.

The foregoing is merely exemplary of the present utility model, and those skilled in the art should not be considered as limiting the utility model, since modifications may be made in the specific embodiments and application scope of the utility model in light of the teachings of the present utility model.

Claims (10)

1. The micro-foaming injection mold with the rapid cooling and rapid heating functions comprises a front mold (1), a rear mold (2) and an injection molding gun (3), wherein the front mold (1) comprises a front compound plate (11) and a first cavity piece (12) arranged on the front compound plate (11), the first cavity piece (12) is provided with a concave cavity, and the injection molding gun (3) penetrates through the front compound plate (11) and the first cavity piece (12); the back mold (2) comprises a back compound plate (21), a base plate (22), a core piece (23) and a second cavity piece (24), wherein the base plate (22) is arranged on the back compound plate (21), one end of the core piece (23) penetrates through the base plate (22) and is arranged on the back compound plate (21), the second cavity piece (24) is arranged on the base plate (22), the second cavity piece (24) is wrapped outside the other end of the core piece (23), and the first cavity piece (12) is covered outside one end of the second cavity piece (24); the method is characterized in that: the mold further comprises a plurality of quenching and quenching pipelines (4), the quenching and quenching pipelines (4) are respectively embedded in the first cavity piece (12), the base plate (22), the core piece (23) and the second cavity piece (24), and the quenching and quenching pipelines (4) are communicated with external quenching and quenching equipment.

2. The micro-foaming injection mold with the rapid cooling and heating functions according to claim 1, wherein: the second cavity piece (24) is formed by combining two sub-pieces, a cavity with two open ends is formed inside the two sub-piece combination, the backing plate (22) is plugged at one open end of the cavity, the core piece (23) is positioned in the cavity, and the end of the core piece penetrates through the opening of the cavity close to one end of the backing plate (22).

3. The micro-foaming injection mold with the rapid cooling and heating functions according to claim 2, wherein: the front mould (1) further comprises a cavity cover (13), the cavity cover (13) is arranged in the cavity of the first cavity piece (12), the cavity cover (13) is provided with an injection molding opening, the injection molding gun (3) performs injection molding through the injection molding opening of the cavity cover (13), the quenching and rapid heating pipeline (4) is embedded in the cavity cover (13), and the cavity cover (13) is used for shielding the other end opening of the cavity.

4. The micro-foaming injection mold with the rapid cooling and heating functions according to claim 2, wherein: the rear mould (2) further comprises two limiting plates (25), the number of the limiting plates (25) is two, the two limiting plates (25) are all arranged on the base plate (22), and the two limiting plates (25) are used for limiting and fixing two sub-parts of the second cavity piece (24).

5. The micro-foaming injection mold with the rapid cooling and heating functions according to claim 4, wherein: the rear mould (2) further comprises four interface seats (26) for communicating and integrating inlet and outlet openings of the plurality of rapid cooling and heating pipelines (4), the number of the interface seats (26) is four, the four interface seats (26) are arranged on the backing plate (22) and are positioned between the two limiting plates (25), and the four interface seats (26) are respectively positioned on two sides of the second cavity piece (24) in pairs.

6. The micro-foaming injection mold with the rapid cooling and heating functions according to claim 5, wherein: the rear mould (2) further comprises a plurality of heat insulation plates (27), the heat insulation plates (27) are arranged outside the second cavity piece (24) in a surrounding mode, and the heat insulation plates (27) are respectively arranged between the second cavity piece (24) and the limiting plate (25) and between the second cavity piece (24) and the interface seat (26).

7. The micro-foaming injection mold with the rapid cooling and heating functions according to claim 6, wherein: the front mould (1) further comprises two limiting blocks (14), the two limiting blocks (14) are arranged on the first cavity piece (12), the two limiting blocks (14) are respectively located between two interface seats (26) on the same side, and the limiting blocks (14) are used for propping against the heat insulation plate (27).

8. The micro-foaming injection mold with the rapid cooling and heating functions according to claim 1, wherein: the front die (1) is provided with four guide posts (15), and the four guide posts (15) are respectively and fixedly arranged at four corners of the front compound plate (11); the rear mould (2) is provided with a guide sleeve (28) matched with the guide post (15), and the guide post (15) is movably accommodated in the guide sleeve (28).

9. The micro-foaming injection mold with the rapid cooling and heating functions according to claim 4, wherein: the mold further comprises a lock module (16) used for connecting and locking the front mold (1) and the rear mold (2), one end of the lock module (16) is connected to the first cavity piece (12) through a screw, and the other end of the lock module (16) is connected to the limiting plate (25) through a screw.

10. The micro-foaming injection mold with the rapid cooling and heating functions according to claim 1, wherein: the first cavity piece (12) and the rear compound plate (21) are respectively provided with a plurality of inlets and outlets which are used for communicating the rapid cooling and rapid heating pipeline (4) with external rapid cooling and rapid heating equipment.